multiple tags of the same commit have non-deterministic results

Works for me.

oslo.config$ git checkout 1.4.0
HEAD is now at 059579a... Merge "Looks for variable subtitution in the same group"
robertc@lifeless-z140:~/work/oslo.config$ python setup.py egg_info
running egg_info
writing pbr to oslo.config.egg-info/pbr.json
writing requirements to oslo.config.egg-info/requires.txt
writing oslo.config.egg-info/PKG-INFO
writing namespace_packages to oslo.config.egg-info/namespace_packages.txt
writing top-level names to oslo.config.egg-info/top_level.txt
writing dependency_links to oslo.config.egg-info/dependency_links.txt
writing entry points to oslo.config.egg-info/entry_points.txt
[pbr] Processing SOURCES.txt
[pbr] In git context, generating filelist from git
warning: no files found matching 'AUTHORS'
warning: no files found matching 'ChangeLog'
warning: no previously-included files matching '*.pyc' found anywhere in distribution
reading manifest template 'MANIFEST.in'
warning: no files found matching 'AUTHORS'
warning: no files found matching 'ChangeLog'
warning: no previously-included files found matching '.gitignore'
warning: no previously-included files found matching '.gitreview'
warning: no previously-included files matching '*.pyc' found anywhere in distribution
writing manifest file 'oslo.config.egg-info/SOURCES.txt'
robertc@lifeless-z140:~/work/oslo.config$ grep Version oslo.config.egg-info/PKG-INFO
Metadata-Version: 1.1
Version: 1.4.0
        * License: Apache License, Version 2.0

1.4.0 and 1.4.0.0a5 both reference the same commit.

We need to pull all the tags for that commit out, and take the semver highest one.

We use 'git describe --exact-match' to obtain this version today, so this is a non-trivial change (and could have perf implications) unless we can find some way to get git to output what we need as efficiently.

It also suggests that git is outputting a surprising tag here, and we should figure out why.

Reporter reports that git describe --exact-match is outputting 1.4.0!

Found where we're getting the tags from - _get_revno_and_last_tag

But we already have this logic in place:
    for row_count, (ignored, tag_set, ignored) in enumerate(changelog):
        version_tags = set()
        for tag in list(tag_set):
            try:
                version_tags.add(version.SemanticVersion.from_pip_string(tag))
            except Exception:
                pass
        if version_tags:
            return max(version_tags).release_string(), row_count

More data: fault seem to be isolated to RHEL 2.6 Python versions at the moment - My reproduction test works on 2.6 and 2.7 on Ubuntu.

various debug traces
http://paste.ubuntu.com/11100215/
http://paste.ubuntu.com/11100333/
http://paste.ubuntu.com/11100657/

I think we've run into this issue recently;

Oct 20 15:49:53 Collecting networking_calico from git+file:///var/www/repo/openstackgit/networking-calico@79bdf4995d102833d23479180350216fc59e4b94#egg=networking_calico&gitname=networking-calico&projectgroup=neutron_all (from -c /var/www/repo/os-releases/18.1.13.dev3/ubuntu-18.04-x86_64/requirements_constraints.txt (line 24))
163 Oct 20 15:49:53 Cloning file:///var/www/repo/openstackgit/networking-calico (to revision 79bdf4995d102833d23479180350216fc59e4b94) to /tmp/openstack-builder/networking-calico
164 Oct 20 15:49:53 Complete output from command python setup.py egg_info:
165 Oct 20 15:49:53 ERROR:root:Error parsing
166 Oct 20 15:49:53 Traceback (most recent call last):
167 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/core.py", line 96, in pbr
168 Oct 20 15:49:53 attrs = util.cfg_to_args(path, dist.script_args)
169 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/util.py", line 259, in cfg_to_args
170 Oct 20 15:49:53 pbr.hooks.setup_hook(config)
171 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/hooks/__init__.py", line 25, in setup_hook
172 Oct 20 15:49:53 metadata_config.run()
173 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/hooks/base.py", line 27, in run
174 Oct 20 15:49:53 self.hook()
175 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/hooks/metadata.py", line 26, in hook
176 Oct 20 15:49:53 self.config['name'], self.config.get('version', None))
177 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/packaging.py", line 824, in get_version
178 Oct 20 15:49:53 version = _get_version_from_git(pre_version)
179 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/packaging.py", line 764, in _get_version_from_git
180 Oct 20 15:49:53 result = _get_version_from_git_target(git_dir, target_version)
181 Oct 20 15:49:53 File "/openstack/venvs/repo-build-18.1.13.dev3/local/lib/python2.7/site-packages/pbr/packaging.py", line 726, in _get_version_from_git_target
182 Oct 20 15:49:53 dict(new=new_version, target=target_version))
183 Oct 20 15:49:53 ValueError: git history requires a target version of pbr.version.SemanticVersion(3.9.2), but target version is pbr.version.SemanticVersion(3.8.4)
184 Oct 20 15:49:53 error in setup command: Error parsing /tmp/openstack-builder/networking-calico/setup.cfg: ValueError: git history requires a target version of pbr.version.SemanticVersion(3.9.2), but target version is pbr.version.SemanticVersion(3.8.4)
185 Oct 20 15:49:53
186 Oct 20 15:49:53 ----------------------------------------
187 Oct 20 15:49:54 Command "python setup.py egg_info" failed with error code 1 in /tmp/openstack-builder/networking-calico/
188

Looking at the git state in networking-calico;

$ git l...

Ok, that's how to reproduce it:
1. git clone https://opendev.org/openstack/networking-calico
2. Add constraints.txt file with content:
git+file:///home/user/networking-calico@79bdf4995d102833d23479180350216fc59e4b94#egg=networking_calico&gitname=networking-calico&projectgroup=neutron_all
where /home/user/networking-calico is path to the cloned repo
3. Add requirements.txt with "networking-calico" in it
4. Run pip wheel --timeout 120 --wheel-dir /tmp/wheel-output --constraint constraints.txt --requirement requirements.txt

I hit this issue on OSA 18.1.12 while following https://docs.openstack.org/openstack-ansible/latest/admin/upgrades/minor-upgrades.html

To solve this issue I change /opt/openstack-ansible/playbooks/defaults/repo_packages/openstack_services.yml

The variable networking_calico_git_install_branch back to 87e780110d3ba0f0b57154ad74f9254aa950acda # HEAD as of 02.06.2019

the same issue with OSA 17.1.6 and 17.1.17:

ERROR:root:Error parsing
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pbr/core.py", line 111, in pbr
    attrs = util.cfg_to_args(path, dist.script_args)
  File "/usr/local/lib/python2.7/dist-packages/pbr/util.py", line 249, in cfg_to_args
    pbr.hooks.setup_hook(config)
  File "/usr/local/lib/python2.7/dist-packages/pbr/hooks/__init__.py", line 25, in setup_hook
    metadata_config.run()
  File "/usr/local/lib/python2.7/dist-packages/pbr/hooks/base.py", line 27, in run
    self.hook()
  File "/usr/local/lib/python2.7/dist-packages/pbr/hooks/metadata.py", line 26, in hook
    self.config['name'], self.config.get('version', None))
  File "/usr/local/lib/python2.7/dist-packages/pbr/packaging.py", line 740, in get_version
    version = _get_version_from_git(pre_version)
  File "/usr/local/lib/python2.7/dist-packages/pbr/packaging.py", line 680, in _get_version_from_git
    result = _get_version_from_git_target(git_dir, target_version)
  File "/usr/local/lib/python2.7/dist-packages/pbr/packaging.py", line 642, in _get_version_from_git_target
    dict(new=new_version, target=target_version))
ValueError: git history requires a target version of pbr.version.SemanticVersion(3.10.1), but target version is pbr.version.SemanticVersion(3.9.3)
error in setup command: Error parsing /tmp/openstack-builder/networking-calico/setup.cfg: ValueError: git history requires a target version of pbr.version.SemanticVersion(3.10.1), but target version is pbr.version.SemanticVersion(3.9.3)

checkout back one commit helps with OSA deploy

OSA 17.1.16 and 17.1.17 sorry